Pulp-machine



(No Model.)

G. B. GARDNER.

' PUL MAGHINB. No. 374,182. Patente *6, 1887.

I Hi N. PETERS. Pho\o-Li\hognpher, Washillgioll. DV 6.

UNITED STATES PATENT OFFICE.

CHARLES B. GARDNER, OF ALLSTON, nosrort MASSACHUSETTS.

PULP-MACHINE.

$PECIPICATION foi'rrning part of Letters Patent No. 374,182, dated December 6, 1887.

Application filed March 10, 1887. Serial No. 230,383.

2" 0 (LZZ whom it may concern.-

Be it known that 1, CHARLES B. GARDNER, of Allston, (B0ston,)'in the county of Suffolk and State of Massachusetts, have invented certain new and useful Improvements in Pulp- Machines, of which the following is a specification.

My invention relates to centrifugal machines for forming pulp into hollow cylinders or similar shapes for the manufacture of refrigerators, ice-coolers, or other articles or wares.

It is the object of my invention to simplify the construction of such machines, to the end that they may be operated with greater ease and readiness and their cost of manufacture reduced to a minimum.

My invention consists in constructing the centrifugal cylinder in two parts, one of which parts is rigidly fixed to the bed and the other is made movable therefrom, together with means for securing the two parts together, so that the removable part may be easily and quickly manipulated in order to remove the constructed article of pulp that may be contained therein and replaced in the same mannerto provide a receptacle for the liquid pulp to be treated.

My invention also consists in the combination of parts in the machine, all as I will now proceed to describe and claim.

Reference is made to the accompanying drawings, and to the letters of reference marked thereon, forming a part of this specification, the same letters indicating the same parts wherever they occur.

Of the drawings, Figure 1 represents a perspective view of my invention, certain parts being shown as broken away. Fig. 2 is avertical sectional view of the same on the linex 00, Fig. 1.

a represents the rotary base of the machine, to which the cylinder, constructed in two parts, 12 c, is secured, each of said parts b c comprising, as it were, one-half of a complete cylinder, which may be considered to be forty inches in height or length and twenty-two inches in diameter, divided longitudinally,

the part 0 having plates d bolted to its lower edge, each of which plates is provided with a rounded bolt-like extension, 6, forming an integral part of the plate, and extends through (No model.)

holes formed in the base a. Said bolt-like extensions e are screw-threaded, adapting them to receive nuts f, these means providing for securing the part c of the cylinder to the base. A shallow flange, g, is formed upon the base a in such position as to be in contact with the lower end part, b, of the cylinder, in order to assist in maintaining the said part b of the cylinder in place laterally when the machine is in operation. A slat, h, having one-half of a dovetail projection or rib formed thereon, is

securely bolted to the side or edge of each part or half of the cylinder in such position that when the two halves or parts of the cylinder are placed in position to form a complete cylinder a complete dovetail projection will be formed at the meeting edges, as clearly represented at D in Fig. 1. A bar or strip, *6, having a dovetail groove formed therein corresponding to the dovetail projection D, constituted as aforesaid, is slid upon said dovetail projections, which contrivances serve to hold the two halves of the cylinder securely together at their meeting-points. Dovetail projection D is slightly wider at its upper than its lower end, which construction permits of an easy removal of the bar or strip when once started, and to facilitate this operation a slight lug or projection,j, is formed on the slide at the foot thereof, under which a bar or lever may be placed to pry it upward. This wedge-shaped form of the dovetail projection D and the corresponding slot in the slide also serve to press the two parts of the cylinder together at their meeting edges, and so form a tightjoint at this point.

k represents a cover or lid for the cylinder, hinged to cars Z, formed on the part c of the cylinder, said cover being provided with a groove, m, on its under side, into which the upper edge or end of the cylinder projects when the lid is closed, as best represented in Fig. 2. A strip, at, of rubber, leather, felt, or other Suitable packing material, may be interposed between the upper end of the cylinder and the bottom of the groove formed therein to insure a tight joint at this point. A rod, 0, is pivoted at its lower end in ears or lugs 12, formed on the base, and at its upper end extends through a hole formed in an ear, q, on the cover, and, being screw'threaded on its upper projecting end, it is adapted to receive a nut, r, by which means the cover may be held securely down, or in closed position.

The operation of my invention is as follows: It being supposed that pulp has been placed in the cylinder and the latter operated so as to form said pulp into an evenly-distributed, firm, and compact mass on the sides, as is common in machines of this class, the cover is loosened and thrown back by removing nut r. Grooved stripsi are slid upward and taken off, when the part b of the cylinder is lifted bodily upward until the lower edge clears flange 9, when it may be taken away and the cylinder of pulp may be removed by tipping the upper end slightly outward and lifting it bodily from place.

By the contrivance described it will be seen that an exceedingly simple and easily and expeditiously manipulated machine is provided, as Well, also, as one thoroughly efficient for the purposes for which it is intended, and strong and durable in all its parts.

It is obvious that parts and features of the invention may-be varied in form and arrangement within the limits of mechanical skill without departing from the nature or spirit of the invention.

Having thus described my invention, what I claim is- 1. The combination, with the rcvoluble base a, of the cylinder composed of the parts I) c, the part 0 being rigidly secured to the base and the part b 'removably connected therewith and withthe part 0, all constructed, arranged, and operating substantially as and for the purposes hereinbeforeset forth.

2. The combination of the revoluble base, the cylinder composed of the fixed part c and the removable part b, and the cover is, hinged to the fixed part, all constructed, arranged, and operating substantially as and for the pur' poses hereinbefore set forth.

3. The combination of the revoluble base, the cylinder composed of the fixed part c and the removable part b, the cover is, hinged to the fixed part, and the rod 0, pivoted to the base and extending through an ear or projection on the cover, as set forth.

4. The combination, with the'cylinder composed of the two parts I) c, of the dovetailed projection D, consisting of the slats h h and the bar or strip 2 as set forth.

In testimony whereof I have signed my name to this specification, in the presence of two subscribing witnesses,this 22d day of January, A. D. 1887.

CHARLES E. GARDNER.

\Vitnesses:

ARTHUR W. GRos'sLEY, FRANK S. Mason. 

